Mold for concrete channels and floors



G. R. ELLIOTT.

MOLD FOR CONCRETE CHANNELS AND FLOORS.

APPLICATION FILED SEPT.27-, 1919. RENEWED 'OCT. 10, 1921. 1,407,737.

Patented Feb. 28, 1922.

2 SHEETSSHEET l- George K2 2220611" WOW 2 SHEETS-SHEET 2.

G. R. ELLIOTT.

Patented Feb. 28, 1922.

MOL D FOR CON CRETE CHANNELS AND FLOORS. APPLICATIONHLED SEPT. 21, I919. RENEWED OCT. 10,1'921. 1,407,737.

UNITED STATES PATENT OFFICE.

GEORGE R. ELLIOTT, OF ECORSE, MICHIGAN.

MOLDFOR CONCRETE CHANNELS AND FLOORS.

Lad 7,737.

Specification of LettersfPatent,

Patented Feb. 28, 1922.

Application filed September 27, 1919, Serial No. 326,814. Renewed October 10, 1921. Serial No. 506,853.

3 To all w/l' 0022. it may concern Be it known that I, Grouch R. Enmorr,

a citizen of the United States of America, residing" at Ecorse, in the county of Vayne and Sthteof Michigan, have invented certain new and useful Improvements in Molds for Concrete Channels and Floors, of which the following is a specification, reference behad therein to the accompanylng drawings.

This invention relates to molds for concrete channels and floors and the object is primarily to render both the outer walls and the core piece of the molds, achustable so as to facilitate removal of the channels or floor members when the same are set.

A further object is to effect the desired :uljustability of the core piece by a mechanism automatically actu'able for engagement with the mold supporting surface whereby the core piece 'will'be made to assume its proper shape for pouring of the channel 'DIGIGlY by disposing the mold in its normal.

position.

A preferred embodiment of the invention is hereinafter described and is illustrated in the accompanying drawings, wherein:

Figure 1 is a plan view of the mold; Figure 2 is a bottom view of the same; Figure 3 is a view of the mold in cross section; I

l igure 4 is a view similar to Figure 3, disclosingan alternative form of the lnvention.

Figure 5 is a sectional elevation of the mold, the section being taken upon line 55 of l igure 1;

Figure 6 is a view similar to Figures 3 and i showing a provision for casting a floor in situ by means of the disclosedconstruction.

The mold in the form shown in Figures 1, 2, and 3 has a core piece disposed between the same. Each side frame comprises a board or plate 1 forming a side wall of the mold, a bottom board or plate 2, and a series of spaced brace members 3 arranged transversely to the members 1 and 2 and rigidly connecting the same. Said side frames are hinged, as indicated at 4;, to elongated strips 5 forming bottoms of the mold chamber.

The core piece comprises a pair of complementary arclrforming members 6, spaced slightly at the center of the arch, as indicated at 6*, brace plates '7 for said membore 6 the bars 9, the strips ends of the core piece to the vertical and hers, arranged transversely thereof within the arch, and a sheet metal facing 8 for the core piece, said facing covering the memv and spanning the space between said members.

pair being hinged respectively to the strips o as 1nd rated at 10 and being hinged to each other at 11 beneath the center of the In'the use of the described construction,

' when a block is being poured, engagement of the members 2 of the side frames with the surface 11 supporting the mold maintains the mold side walls 1 vertical, and engagement of said surface with the bars 9 maintains the same in alignment with each other so that the arch-forming members 6 occupy their proper relative positions shown in full lines in Figure 3. hen the channel is to be removed from the mold,the latter may be either arranged on edge, that is to say with one of the side frames acting as a support, or may be completely inverted. This permits either one or both of these frames to be swung upon the hinge 4: to the dash. line position shown in Figure 3, and allows the bars 9 to be shifted to the angular relation similarly indicated in said figure. The two halves of the core member are thus subjected to a slight swinging movement-toward each. other permitted by flexing of that portion of the sheet metal. 8 spanning the space interval 6 between the members 6, the shifted position of said halves being also shown in dash lines in Figure 3. The core piece thus acquires a slight clearance from the block whereby the latter may be removed from themold without binding or danger of breakage. After removal of the block, the side frames comprisedby the parts 1, 2 and 3 are returned to their normal positions and the mold is again disposed in pouring position upon the The strips 5 are connected by spaced pairs of bars 9, the bars of each of saio sides, in this floor or other supporting surface, the latter efiecting the shifting of the bars 9 into alignment and a consequent return of-the halves of the core piece to their normalrelation.

In the construction which is disclosed'in Figure l, there is employed the same core piece as has been already described, but theparts formingthe sides 01" the mold are en tircly separate from said core piece. Each istance, is formed'by a pair of angle bars and 16 set back to back, the vertical flange of the bar 15 forming an outer wall of the mold, and the horizontal flange thereof projecting slightly be-v neath the adjacent half of the core piece and supporting the same, and forming at the same time a bottom for the mold chamber.

That I claim as my invention is: 1. A core piece for concrete channel molds. comprising a pair of complementary arch-forming members, a flexible connection between said members at the top of the arch,

and an adjusting means for said members formed by a pair of bars having opposed ends respectively pivotally connected to the arch-forming members and adjacent ends pivotally engaging each other, said bars being normally aligned to maintain the arch forming members adjusted for pouring, and

being angularly adjustable to swing the archeforming members toward each other.

2. A core piece for concrete channel molds, comprising a pair of complementary arch-forming members, a sheet metal facing for said members, establishing a flexible connection between the same at the top of the arch, and means for angularly adjusting the arch-forming members about an axis established by said flexible connection.

8. A core piece for concrete channel molds, comprising a pair of complementary arch-forming members, a facing for said members. establishing a flexible connection between the same at the top of the arch, and a pair of bars arranged transversely of the core piece at the bottom thereof, pivotally connected at their adjacent ends, and having their opposed ends respectively pivotally at- I tached to the arch forming members.

4:. A core piece for concrete channel molds, comprising a pair. of complementary arch-forming members, means establishing a flexible connection between said members at the top of the arch, members forminga bottively to the arch-formingmembers atthe the arch-forming members toward each other about said flexlbleconnection.

of which core:piece are adjustable toward each other to establish a clearance from the molded channel, to facilitate the removal of the same, of a pairof barsa 1. anged transversely of the core piece at the bottom thereof, pivotally connected at their adjacent ends and pivot-ally engaging the sides of the core piece at their opposed ends, the adjacent ends of said bars being downwardly adjustable to an angularrelation to establish a clearance, and being upwardly adjustable to an aligned relation through engagement with thejsuriace supporting the core piece.

6. A concrete channel mold, comprising a core piece, members secured to opposite sides of the corepiece forming the bottom of the mold chamber, and side pieces for the mold chamber respectively pivotally connected to said bottom forming members. 1

7. A concrete channel mold, comprising'a pair ofcomplementary arch members forming acore piece, means flexibly connecting said members at the top of the arch, mechanism for swinging said members about said flexible connection to establish a clearance from the molded channel. and side pieces for the mold pivotally connected to the core piece. 7 v i In testimony whereof I aflix my signature.

GEORGE R. ELLIOTT.

a. The combination with an arched core piece i'or concrete channel molds, the sides tom to the mold chamber, secured respec- 

